JPH0632920B2 - Continuous punching device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sheet punching device, and more particularly to a device for continuously punching a product having a predetermined shape from a material sheet having a roll shape or a constant shape, In a punching device of a type in which a base sheet opposed to the punching die with a material sheet sandwiched is formed in a loop shape, the punching die is pressed against the base sheet, and the base sheet material sheet is intermittently transferred synchronously. The traces of the cutting edge are crushed during punching to improve the durability of the base sheet and improve the finish of the product outer shape.

[Prior Art and its Problems] As a punching device for continuously punching small sheet-shaped products from a roll-shaped material sheet, there is one shown in FIG.

As shown in the figure, this is a punched section (P).
The material sheet (S) passing through the
When (S) is stopped, the punching device provided in the punching section (P) punches the product (A) from the material sheet (S).

Since this product (A) is completely separated from the material sheet (S) by the punching, the die (1)
Is the product (A), (A) punched in the punching section (P), facing the base sheet (11) that contacts the upper surface of the bed (10) and runs intermittently in synchronization with the material sheet (S). Is the base sheet (1
It is placed on 1) and sent through the chute (19) to the product removal section (B). In order to enable continuous hitting and continuous removal of the products (A) and (A), conventionally, the base sheet (11) is formed into a loop and the base sheet (1
The main roll (21), (21) that rotates 1) is driven to run at a predetermined timing. Since the main rolls (21), (21) run the material sheet (S), at least one of them serves as a drive roll that is driven to rotate intermittently, and a pair of press rolls (20),
(20) is provided, which operates in synchronization with the main roll, and both the material sheet (S) and the base sheet (11) are maintained in a stopped state during the punching process.

According to this conventional one, the roll-shaped material sheet (S) is continuously punched in the punching section (P), and the product (A),
(A) is taken out to the product take-out section (B), and scrap (C) passes through the press roll (20) located downstream of the punching section (P) and the take-up reel (22).
It can be separated into product (A), (A) and scrap (C).

However, in this conventional example, the durability of the base sheet (11) is insufficient.

This is when the cutting die (1) is pressed against the material sheet (S) placed on the surface of the base sheet (11) made of rubber, plastic, etc., as shown in FIG. The part (12) bites into the surface of the base sheet (11) at the final point of the punching operation,
This is a partially raised trace (1
3), and as the number of punches increases, this trace (13)
Are innumerable on the surface of the base sheet (11). Then, as a result, the smoothness of the surface of the base sheet (11) is lost, and when the blade edge portion (12) is pressed against the material sheet (S), an incomplete cut portion occurs.

That is, even if the base sheet (11) has sufficient strength, the surface smoothness is reduced.
The cutting edge portion (12) of (1) does not function as the other party to contact. This means that the rectangular material sheet (S),
The same can be said for a device configured to feed (S) at a predetermined timing.

* About the 1st invention [Technical problem] The 1st invention is such a "loop-shaped base sheet (11) that runs in the same direction in synchronization with the intermittently running material sheet (S)". The material sheet (S) and punching section (P)
At the top of the bed (10) at
A punching device that presses the cutting edge part (12) of the cutting die (1) arranged opposite to the upper surface of the bed (10) when the material sheet (S) and the base sheet (11) are stopped. In order to increase the durability of the base sheet (11), the traces (13) formed on the surface of the base sheet (11) are
It is a technical problem to make it disappear or be smoothed during the traveling process of.

[Technical Means] The technical means of the present invention taken to solve the above technical problem is that "a part of the return path of the base sheet (11) is punched out and the bed (10) and the outward path of the section (P) are It is located between the base sheets (11) '.

[Operation] The above technical means of the present invention operates as follows.

The base seat (11) runs intermittently in a loop, but the base seat
Since a part of the return path of (11) is located between the bed (10) in the punching section (P) and the base sheet (11) on the outward path, the upper surface of the bed (10) has a return direction. Base sheet (1
1) and the forward direction base sheet (11) are overlapped with each other, and during the punching operation, the material sheet (S) is placed on the bed via the double base sheets (11), (11). Supported by (10). Then, in this state, the cutting edge (12) of the punching die (1) bites into the surface of the base sheet (11) on the upper layer side (outward side), and the material sheet (S) becomes product (A), (A). Punched out.

At this time, a trace (13) will be generated on the surface of the base sheet (11) on the outward path, but due to the traveling of the base sheet (11), the generation unit of these traces (13), (13) causes the number of punching times. The bed returns to the upper surface of the bed (10) in accordance with

When the punching operation is performed in this return state, the surface of the base sheet (11) having the resistance traces (13) and (13) is in contact with the surface of the bed (10), and the material sheet ( The pressure of the die (1) when punching the products (A) and (A) from (S) acts on the base sheet (11) of the lower layer via the base sheet (11) on the outward path, and this return side Traces (13), (13) of the uneven cross section that have been generated on the surface of the base sheet (11) are pressed against the surface of the bed (10) and are crushed.

In this way, the traces (13), (13) formed on the surface of the base sheet (11) in the punching process are crushed in the subsequent punching process and are provided with the traces (13), (13). The surface of the sheet (11) will be smoothed.

[Effects] The present invention having the above-described configuration has the following unique effects.

Traces (1) generated on the surface of the base sheet (11) during the punching process
3) and (13) are crushed in the subsequent punching process to smooth the surface of the base sheet (11) having the traces (13) and (13), so that the punching section (P) is The surface of the base sheet (11) fed in will always be kept smooth, and the number of times of durable punching of the base sheet (11) will increase significantly.

* Regarding the second invention [Problem] The second invention is a sheet using the above-mentioned first invention, which is not possible with the conventional apparatus described above (1
The task is to facilitate the exchange of 1).

[Technical Means] A technical means of the second invention for solving the above-mentioned problem is to "a pair of main rolls (21), (2) which stretches a base sheet (11).
1) One of the end support members of the other main roll can be removed while the other one can be removed. ”

[Operation] The technical means of the present invention operates as follows.

A base sheet (11) stretched between a pair of main rolls (21), (21)
Is on the upper surface side of the bed (10) in the punching section, and the forward path side and the return path side thereof overlap each other. Therefore, when one of the main rolls (21) is removed, the base sheet (11) is in a loosened state, and the base sheet (11) can be drawn to the other main roll side.

Next, when the end supporting member of the other main roll (21) is removed, one end of this main roll is in a free state, and the base sheet (11) pulled up as described above is on the free end side of the main roll. Can be removed from.

In order to attach a new base sheet, the base sheet may be mounted in the reverse order of the above, and the main roll and the end support members may be mounted in the reverse order of the above.

[Effect] Since it is possible to replace the base sheet by removing one main roll and removing one of the end supporting members of the other main roll, the return side base sheet is placed below the bed (10). Replacing the pedestal sheet (11) is much easier compared to the conventional type of positioning.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

In the apparatus of the first embodiment shown in FIG. 1, the bed sheet (11) is an endless belt made of rubber, plus chips, etc., and the bed sheet (11) is provided on the upper surface of the machine body (K). It is stretched so as to be doubled on the upper surface of the bed, and is wound in a loop between the drive roll (21a) and the free roll (21b) provided on both sides of the machine body (K), and the bed (10) By the tension rollers (23), (23) arranged near both ends of the base sheet (11), the base sheet (11) between the rollers is pushed up to the upper base sheet (11) side.

In particular, in this embodiment, the tension roller (23), the position where the tension rollers (23) are arranged and the drive roll (21a) so that there is a constant gap between the forward path side and the backward path side of the base sheet (11). ) And the free roll (21b) are set to the position of the machine (K)
A floating plate (14) supported on the upper surface of the bed so as to be able to move up and down in the vicinity of the bed (10) above the bed (10) has a seat (1).
It is installed between the forward and return sides of 1).

The floating plate (14) is a top plate of the fuselage (K) as shown in FIG.
It is supported by lifting shafts (16), (16) that penetrate through (15), and these lifting shafts (16), (16) are interposed between the floating plate (14) and the top plate (15). It is constantly urged upward by the spring (17). The highest position of the floating plate (14) is the base sheet (1
The position is set so that 1) can be lifted slightly.
Therefore, there is usually a small gap between the floating plate (14) and the base sheet (11) on the return side, and when punching by the lowering operation of the punching die (1), the punching die (1) On the outboard side seat (1
1) is pushed down, the floating plate (14) is pressed against the base sheet (11) on the return side, thereby the base sheet (11) on the return side.
Are pressed against the upper surface of the bed (10).

In this embodiment, it is stretched between the drive roll (21a) and the free roll (21b) so that the pressing rolls (20), (20) are pressed against the upper surface of the base sheet (11) on the outward path. The pressing rolls (20) and (20) are both set to freely rotate. And this press roll (20)
The material sheet (S) is inserted between the base sheet (11) and the base sheet (11), and the scraps of the material sheet (S) punched with the products (A) and (A) in the punching section (P) are taken up by the take-up reel (22 ) So that it can be wound up at a predetermined speed.

Therefore, the material sheet (S) and the base sheet (11) automatically operate in synchronization with each other, and the transfer amount absorbing section (provided between the downstream press roll (20) and the take-up reel (22) ( By 24), the transfer deviation between the continuous winding and the intermittent transfer in the punching section (P) is absorbed.

In this embodiment, traces (13) formed on the base sheet (11),
(13) is that when the products (A) and (A) are punched out, the downward pressure of the punching die (1) acts through the floating plate (14) when it has returned to the position below the floating plate (14). Therefore, the traces (13) and (13) are crushed by the same action as described above.

Next, in the case of this embodiment, the floating plate (14) is attached to the top plate (15).
The drive roll (21a) is supported in a cantilever state as shown in FIG.
Since the (33), (36) and the free roll (21b) can be removed, the base sheet (11) can be easily replaced.

This configuration corresponds to the second aspect of the invention described above. Next, this point will be described in more detail with reference to FIGS. 4 and 5.

The drive roll (21a) and the free roll (21b) are arranged on both sides of the upper surface of the machine body (K) so as to be parallel to the traveling direction of the base sheet (11) as shown in FIG. Side rail (3
It is installed between 1) and (32), and one drive roll (21a)
Is basically supported in a cantilevered state by one of the horizontal rails (31), and the servo motor (3
It is directly connected to 0). The other end of this drive roll (21a)
Although it is rotatably supported by the other cross rail (32),
This shaft support structure is different from the shaft support structure on the side of the horizontal rail (31).
That is, the pivotal support portion of the horizontal rail (32) is pivotally supported by the auxiliary rail (33) which is connected to the horizontal rail (32) and is removably mounted on the horizontal rail (32). Further, the auxiliary rail (33) can be attached / detached from the end of the horizontal rail (32) with one touch by the clamp device (35).

The other free roll (21b) is erected between the other feed end of the horizontal rail (32) and the horizontal rail (31), and is rotatably supported by the free roll (21b). In order to make it removable, the auxiliary bar (36) similar to the above case is detachably connected to the horizontal bar (32), and the free roll is connected by this auxiliary bar (36) and the other horizontal bar (31). Uses a structure that supports the shaft. Of the shaft supporting portions, at least one of the shaft supporting portions on the side of the horizontal rail (31) is configured to detachably hold the free roll (21b),
As shown by the chain double-dashed line in FIG.
When it is removed from the cross rail, it can be removed from the horizontal rails (31) and (32) together with or separately from the auxiliary rail.

Therefore, when removing the base sheet (11), move the set position of the tension rollers (23) and (23) to remove the base sheet (1).
Loosen the tension of 1), remove the floating plate (14), remove the auxiliary rail (36), remove the free roll (21b) from the horizontal rail (31), and then mount the base sheet (11) on the drive roll (21a). Crawl to the side. Next, when the auxiliary rail (33) is removed, the drive roll (21a)
Since the support bar is not located on the free end side of the drive roll, the base sheet (11) can be removed from the free end side of the drive roll.

In order to attach a new base sheet (11), it is stretched between the drive roll (21a) and the free roll (21b) in the reverse order of the above.

Particularly, in this embodiment, the auxiliary bar (33) and the auxiliary bar (36) are
Both are configured so that they can be easily attached and detached by the clamp device (35), so that the work of exchanging the base sheet (11) is easy.

In order to make the set positions of the tension rollers (23), (23) movable, each tension roller (23) is rotatably supported by a lever that can swing within a certain range as shown in FIG. It suffices if the supporting posture of the lever can be fixed at two positions.

The floating plate (14) can be detached by simply inserting the elevating shafts (16), (16) into the through holes formed in the upper plate (15).

In the above-mentioned embodiment, the floating plate (14) is interposed between the outward-side base sheet (11) and the return-side base sheet (11), but the floating plate (14) is not always necessary. Instead, the forward sheet side and the return sheet side seats (11) may be in direct contact with each other.

In each of the above examples, the die (1) is required to have a certain degree of hardness and flexibility. Therefore, hard rubber or synthetic resin containing tire cords or fibers is suitable.

In addition, in FIG. 1, the plate body (18) arranged in the vicinity of the presser roll (20) on the downstream side ensures separation of the products (A) and (A) from the blank material sheet (S). It is a guide plate for.

In each of the above examples, the case where the product sheet (S) is punched out from the product in which the material sheet (S) is wound into a roll is explained, but when the material sheet (S) is a single leaf As shown in Fig. 6, the material sheets (S) and (S) are stacked in stock on the paper feeding side, and the laminated sheets are fed to the paper feeding device (4).
It should be sent to the punching section by.

In this case, set the distance between the press rolls (20), (20) to the material sheet.
If it is smaller than the running length of (S), the base sheet
Intermittent running of the material sheet (S) running while being placed on (11) is ensured. Particularly, in this case, the pressing rolls (20), (20) may be so-called free rolls to which no driving force is applied. This is because the pressing rolls (20), (20) rotate in synchronization with the intermittent running of the base sheet (11), and the clamping force of both presses the material sheet (S) intermittently at a predetermined timing.

Also, in this embodiment, an auxiliary roll (25) is provided following the pressing roll (20) located on the downstream side of the material sheet (S), and the scrap (C) is guided upward in the tangential direction of this auxiliary roll. The guide plate (26) is fixed.

This guide plate is fixed above the chute (19) and bent upward, and the material sheet (S) punched from the products (A) and (A) in the punching section (P) is the base sheet.
It is sent out in the tangential direction by the pressing force of (11) and the pressing roll (20), but the scrap (C) and the products (A) and (A) are completely separated in the punching section (P). From the above, only the scrap (C) is moved in the tangential direction, and the products (A) and (A) are transferred while being placed on the base sheet (11), and then through the chute (19). Delivered to product removal section (B). Therefore, in this part, the products (A), (A) and the scrap (C) are separated.

Then, the scrap (C) separated in the above portion reaches the guide plate (25) and is bent upward by this guide plate,
They are sequentially placed in the scrap take-out section (D) provided separately from the product take-out section (B).

In order to ensure the removal of this scrap, it is possible to equip a pair of extraction rolls (27), (27) that rotate in synchronization with the base sheet (11) near the guide plate. Is.

[Brief description of drawings]

1 is an overall explanatory view of an embodiment of the present invention, FIG. 2 is a sectional view of a punching section (P), FIG. 3 is a plan view, and FIG. 4 is an explanatory view of a support structure for a tension roller (23), FIG. 5 is an explanatory view of the main roll support structure, FIG. 6 is an explanatory view of the second embodiment,
7 to 9 are explanatory views of a conventional example, in which (1) …… Die mold, (S) …… Material sheet (11) …… Base sheet, (10) …… Bed ( P) …… Punching section (12) …… Blade edges (21), (21) …… Main roll

Claims (2)

[Claims] 1. A bed sheet (10) in a punching section (P) of a blank sheet (11) and the sheet material (S) that are in the same direction as the material sheet (S) that intermittently travels in the same direction. The blade edge (12) of the punching die (1) placed on the upper surface and facing the bed (10) is attached to the material sheet (S) and the base sheet (1).
In a punching device that pressurizes the upper surface of the bed (10) when stopping (1), a part of the return path of the base sheet (11) is part of the return path of the base sheet (11) and the bed sheet (10) of the punching section (P) and the base sheet of the outward path. Continuous punching device located between (11). 2. A pair of main rolls (2) for tensioning a base sheet (11).
The continuous punching device according to claim 1, wherein one of (1) and (21) is removable and one of the end supporting members of the other main roll is removable.